| olecranon process | <anatomy> The large process at the proximal end of the ulna which projects behind the articulation with the humerus and forms the bony prominence of the elbow. Origin: NL, fr.Gr.; elbow + the head. Source: Websters Dictionary (01 Mar 1998) |
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| olecranon reflex | Flexion of the forearm caused by tapping the olecranon. Synonym: paradoxical triceps reflex. (05 Mar 2000) |
| olefiant | <chemistry> Forming or producing an oil; specifically, designating a colourless gaseous hydrocarbon called ethylene. Origin: F. Olefiant, fr.L. Oleum oil + -ficare (in comp). Cf. -Fy. Source: Websters Dictionary (01 Mar 1998) |
| olefin | <chemistry> An organic molecule containing carbon and hydrogen atoms in straight or branched chains, where at least one carbon-carbon bond is a double bond. One of three major classes of aliphatic hydrocarbons. (13 Nov 1997) |
| olefine | <chemistry> Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See Ethylene. Origin: From Olefiant. Source: Websters Dictionary (01 Mar 1998) |
| oleic | <physiology> Pertaining to, derived from, or contained in, oil; as, oleic acid, an acid of the acrylic acid series found combined with glyceryl in the form of olein in certain animal and vegetable fats and oils, such as sperm oil, olive oil, etc. at low temperatures the acid is crystalline, but melts to an oily liquid above 14 C. Origin: L. Oleum oil: cf. F. Oleique. Source: Websters Dictionary (01 Mar 1998) |
| oleic acid | Organic, monobasic acids derived from hydrocarbons by the equivalent of oxidation of a methyl group to an alcohol, aldehyde, and then acid. Fatty acids are saturated and unsaturated (fatty acids, unsaturated). (12 Dec 1998) |
| oleic acids | A group of fatty acids that contain 16 carbon atoms and 9 double bonds at the omega 9 carbon. (12 Dec 1998) |
| oleiferous | Producing oil; as, oleiferous seeds. Origin: L. Oleum oil: cf.F. Oleifere. Source: Websters Dictionary (01 Mar 1998) |
| olein | <physiology> A fat, liquid at ordinary temperatures, but solidifying at temperatures below 0 deg C, found abundantly in both the animal and vegetable kingdoms (see Palmitin). It dissolves solid fats, especially at 30-40 deg C. Chemically, olein is a glyceride of oleic acid; and, as three molecules of the acid are united to one molecule of glyceryl to form the fat, it is technically known as triolein. It is also called elain. Origin: L. Oleum oil: cf. F. Oleine. Source: Websters Dictionary (01 Mar 1998) |
| oleo- | Oil. See: eleo-. Origin: L. Oleum (05 Mar 2000) |
| oleogomenol | <chemical, remedy> An ethereal oil obtained from a plant, Melaleuca viridiflora; the chief constituent is cineole. It has germicidal action, is free from irritating properties, and has been used in chronic inflammations of the pulmonary mucous membrane and as a vermifuge. Synonym: oleogomenol. Origin: Gomen, a locality in New Caledonia, + L. Oleum, oil (05 Mar 2000) |
| oleogranuloma | A nodule or focus of granulomatous inflammation (usually of the foreign-body type) in association with lipid material deposited in tissues, e.g., after the injection of certain oils. See: paraffinoma. Synonym: eleoma, oil tumour, oleogranuloma, oleoma. (05 Mar 2000) |
| oleograph | 1. <chemistry> The form or figure assumed by a drop of oil when placed upon water or some other liquid with which it does not mix. 2. A picture produced in oils by a process analogous to that of lithographic printing. Origin: L. Oleum oil + -graph. Source: Websters Dictionary (01 Mar 1998) |
| oleoma | A nodule or focus of granulomatous inflammation (usually of the foreign-body type) in association with lipid material deposited in tissues, e.g., after the injection of certain oils. See: paraffinoma. Synonym: eleoma, oil tumour, oleogranuloma, oleoma. (05 Mar 2000) |